151365681 has 12 divisors (see below), whose sum is σ = 221719680. Its totient is φ = 99488760.

The previous prime is 151365679. The next prime is 151365707. The reversal of 151365681 is 186563151.

151365681 is a `hidden beast` number, since 1 + 513 + 65 + 6 + 81 = 666.

It is not a de Polignac number, because 151365681 - 2¹ = 151365679 is a prime.

It is a super-3 number, since 3×151365681³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (151365661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117801 + ... + 119078.

It is an arithmetic number, because the mean of its divisors is an integer number (18476640).

Almost surely, 2^151365681 is an apocalyptic number.

It is an amenable number.

151365681 is a deficient number, since it is larger than the sum of its proper divisors (70353999).

151365681 is a wasteful number, since it uses less digits than its factorization.

151365681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236956 (or 236953 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 151365681 is about 12303.0760787699. The cubic root of 151365681 is about 532.9369184039.

The spelling of 151365681 in words is "one hundred fifty-one million, three hundred sixty-five thousand, six hundred eighty-one".